I have had the same thing happen to my Club Cars and it has always turned out to be water contamination in the fuel. I would try ether and it would not light up, but I would pull the bowl off, clean it out, get fresh gas in it with some water burn gas treatment, and presto. Runs even better than before. I'm not saying that is what your problem is, but it doesn't cost you anything. Clean your plug, clean your bowl, check your gas, good luck.